sil-calculator

Safety Integrity Level calculation skill for SIF design and verification per IEC 61511

509 stars

bya5c-ai

View on GitHub Installation ↓

Best use case

sil-calculator is best used when you need a repeatable AI agent workflow instead of a one-off prompt.

Safety Integrity Level calculation skill for SIF design and verification per IEC 61511

Teams using sil-calculator should expect a more consistent output, faster repeated execution, less prompt rewriting.

When to use this skill

You want a reusable workflow that can be run more than once with consistent structure.

When not to use this skill

You only need a quick one-off answer and do not need a reusable workflow.
You cannot install or maintain the underlying files, dependencies, or repository context.

Installation

Claude Code / Cursor / Codex

$curl -o ~/.claude/skills/sil-calculator/SKILL.md --create-dirs "https://raw.githubusercontent.com/a5c-ai/babysitter/main/library/specializations/domains/science/chemical-engineering/skills/sil-calculator/SKILL.md"

Manual Installation

Download SKILL.md from GitHub
Place it in .claude/skills/sil-calculator/SKILL.md inside your project
Restart your AI agent — it will auto-discover the skill

How sil-calculator Compares

Feature / Agent	sil-calculator	Standard Approach
Platform Support	Not specified	Limited / Varies
Context Awareness	High	Baseline
Installation Complexity	Unknown	N/A

Frequently Asked Questions

What does this skill do?

Safety Integrity Level calculation skill for SIF design and verification per IEC 61511

Where can I find the source code?

You can find the source code on GitHub using the link provided at the top of the page.

SKILL.md Source

# SIL Calculator Skill

## Purpose

The SIL Calculator Skill determines Safety Integrity Levels for Safety Instrumented Functions and verifies SIF designs meet required risk reduction per IEC 61511.

## Capabilities

- SIL determination (risk graph, LOPA, risk matrix)
- PFDavg calculations
- Proof test interval optimization
- Common cause failure analysis
- Hardware fault tolerance verification
- Diagnostic coverage assessment
- Systematic capability evaluation
- SIF verification calculations

## Usage Guidelines

### When to Use
- Determining SIL requirements
- Designing safety instrumented functions
- Verifying SIF performance
- Optimizing proof test intervals

### Prerequisites
- HAZOP recommendations available
- Risk criteria defined
- Component failure data available
- Architecture selected

### Best Practices
- Use consistent methodology
- Document all assumptions
- Consider common cause failures
- Verify systematic capability

## Process Integration

This skill integrates with:
- Safety Instrumented System Design
- HAZOP Study Facilitation
- Pressure Relief System Design

## Configuration

```yaml
sil-calculator:
  determination-methods:
    - risk-graph
    - lopa
    - risk-matrix
  failure-databases:
    - OREDA
    - SINTEF
    - exida
```

## Output Artifacts

- SIL determination reports
- PFDavg calculations
- SIF specifications
- Verification reports
- Test interval recommendations

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